11278331 has 2 divisors, whose sum is σ = 11278332. Its totient is φ = 11278330.

The previous prime is 11278313. The next prime is 11278357. The reversal of 11278331 is 13387211.

Together with previous prime (11278313) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (11278357) can be obtained adding 11278331 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11278331 is a prime.

It is a super-2 number, since 2×11278331² = 254401500291122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11278331.

It is not a weakly prime, because it can be changed into another prime (11278301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5639165 + 5639166.

It is an arithmetic number, because the mean of its divisors is an integer number (5639166).

Almost surely, 2^11278331 is an apocalyptic number.

11278331 is a deficient number, since it is larger than the sum of its proper divisors (1).

11278331 is an equidigital number, since it uses as much as digits as its factorization.

11278331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 26.

The square root of 11278331 is about 3358.3226467985. The cubic root of 11278331 is about 224.2581725124.

The spelling of 11278331 in words is "eleven million, two hundred seventy-eight thousand, three hundred thirty-one".